Dynapac F1000W T4f, Operation & Maintenance Manual

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D 4.0 22
2 Malfunctions
2.1 Problems during paving
Problem Cause:
Wavy surface
(”short waves”)
- change in the material temperature, segregation
- wrong material composition
- incorrect operation of the roller
- incorrectly prepared foundation
- long idle standing times between loads
- grade control reference line is not suitable
- grade control jumps to the reference line
- grade control toggles between up and down
(inertia setting is too high)
- bottom plates of the screed are loose
- bottom plates of the screed are warped or not uniformly
worn
- screed does not work in the floating position
- too much play in the mechanical screed link/suspension
- paver speed is too high
- augers are overloaded
- changing material pressure against the screed
Wavy surface
(”long waves”)
- change in the material temperature
- segregation
- roller has stopped on the hot material
- roller has turned or roller speed has been changed too
quickly
- incorrect roller operation
- incorrect foundation preparation
- truck brake is applied too tight
- long idle standing times between loads
- grade control reference line is not suitable
- incorrect installation of the grade control
- limit sensors are not correctly set
- screed is empty
- screed has not been switched to the floating position
- too much play in the mechanical screed link
- auger is set too deep
- auger is overloaded
- changing material pressure against the screed
Cracks in the layer
(over the entire
width)
- material temperature is too low
- change in the material temperature
- moisture on the foundation
- segregation
- wrong material composition
- wrong layer height for the maximum grain size
- cold screed
- bottom plates of the screed are worn or warped
- paver speed is too high